Confluence Throws ERROR: 400 in Browser When Manually Uploading Add-Ons
Platform Notice: Server and Data Center Only. This article only applies to Atlassian products on the server and data center platforms.
When uploading an Add-On through the Upload add-on link, the Uploading box does not update and the browser gets stuck waiting.
Using Ctrl+Shift+I and watching the network tab, the following URL appears with a 400 error
And this error appears in the server response detail (this can be also seen in a HAR file).
<html><head><title>Error</title></head><body> <h2>ERROR: 400</h2> <br> </body></html>
Nothing is shown in
- Confluence is running behind a reverse proxy
The reverse proxy is not allowing the upload of the file.
Set up a non-proxied
<Connector /> in
server.xml and use that for uploading the Add-On. You can review the documentation here